Latest Wireless/RF Technical Articles

This is one simple way to control a LED, fan, relay or solenoid with a computer and a PIC.

This is one simple way to control a LED, fan, relay or solenoid with a computer and a PIC.

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set…

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set up an audio detection device that can be used to catch your roommate stealing things from the fridge or send you an alert if the noise in your room goes above a certain threshold.

Multiplexing was developed in the early 1870s, but it’s become much more applicable to digital telecommunications in…

Multiplexing was developed in the early 1870s, but it’s become much more applicable to digital telecommunications in the late 20th century. Today, frequency division multiplexing (FDM), time division multiplexing (TDM), and wavelength division multiplexing (WDM) have become an extremely important asset to telecommunication processes and has greatly improved the way that we transmit and receive independent signals over AM and FM radio, telephone lines, and optical fibers.

An in-depth look at transformer isolation. Electrical isolation is necessary to protect circuits, equipment, and people…

An in-depth look at transformer isolation. Electrical isolation is necessary to protect circuits, equipment, and people from shocks and short circuits, as well as to make accurate measurements. Isolation transformers are one way to go.

Smith Charts are an extremely useful tool for engineers and designers concerned with RF circuits. This article covers the…

Smith Charts are an extremely useful tool for engineers and designers concerned with RF circuits. This article covers the mathematics behind creating the chart and its physical interpretation.

Learn how to connect your device with Linux Screen using the built-in Lua interpreter to set up the file system and…

Learn how to connect your device with Linux Screen using the built-in Lua interpreter to set up the file system and connect to the network. Then, learn how to automate the scripting process with Luatool and put it all together with a basic TCP server that can interact with a pulse-width modulated LED, a potentiometer, and a switch.

How to estimate wireless communication range from radio parameters.

How to estimate wireless communication range from radio parameters.

Compile and install NodeMCU on the ESP8266 IoT chip using Linux tools and the ESP Open Source SDK

Compile and install NodeMCU on the ESP8266 IoT chip using Linux tools and the ESP Open Source SDK

Qi (pronounced as "chee") charging is an optimized inductive charging concept also known as “wireless charging,”…

Qi (pronounced as "chee") charging is an optimized inductive charging concept also known as “wireless charging,” allowing you to charge your devices wirelessly. Compatible devices’ batteries are charged by using induction transfer without requiring separate chargers, cables or adapters... Simply place your compatible device on top of the wireless pad and watch your device charge. Finally--an end to cords!

An infrared (IR) light sensor allows the use of an Arduino to receive and decode signals from a TV remote control.

An infrared (IR) light sensor allows the use of an Arduino to receive and decode signals from a TV remote control.

This project will help you get started with the Arduino, including a description of the different types of Arduinos, how…

This project will help you get started with the Arduino, including a description of the different types of Arduinos, how to download the Arduino software development environment, and describe the different shields that are available for the Arduino along with the accessories you will need to develop Arduino projects.

Pulse-width modulation can be of many forms. A PWM signal of constant frequency can be obtained by comparing the ramp…

Pulse-width modulation can be of many forms. A PWM signal of constant frequency can be obtained by comparing the ramp signal (or carrier signal) with the error between the desired and the actual output voltage signal (Vc, compensator voltage signal).